What are the Washington laws regarding window tinting?

A: Here’s the big one: The maximum level of sun screening material that can legally be applied to any window, except the windshield, shall have a total reflectance of 35% or less, and a light transmittance of 35% or more resulting in a minimum of 24% light transmission on AS-2 glazing.

That’s covered in section 46.37.430 of the Revised Code of Washington.

Window tinting is defined in the Washington Administrative Code as permanent, semi-permanent or temporary products that reduce the adverse effects of the sun.

Mirror finish products are not allowed. Red, yellow, gold or black material is also not allowed, according to section 46.37.430 of the Revised Code of Washington. Brushed or sprayed-on material is also off limits.

Citing the Washington Administrative Code, the State Patrol says sun-screening devices or recreational products may not be applied to, or suspended between the driver and the windshield, or to the windows to the immediate right and left of the driver.

They say recreational products may be applied to other windows only if they do not interfere, by their size and/or position with the driver’s ability to see other vehicles, persons, and objects.

A driver must have both left and right side mirrors if windows are tinted, allowing a 200-foot view to the rear. That’s covered in RCW section 46.37.430.

A greater degree of sun screening may be applied to the top six inches of the windshield.

And doctor’s orders can provide exceptions to the tinting laws.

State Patrol troopers say they carry cards that can determine the degree of tinting, and the basic fine for violating the law is a traffic infraction, $124.

For additional details, including rear window tinting for cars made prior to June 1990, click here.

This information came from the State Patrol, which also covers the question on their FAQ page.

Thanks to the people who submitted questions. Previous answers are linked below.